一种估计飞行器运动特性的实用极大似然法

飞行器运动特性受非线性因素和随机噪声的影响，给气动系数，飞行稳定性与操纵性指标的结构模型辨识带来许多困难。为了解这个问题，首先提出了使用极大似然估计法，以提高辨识效率。接着建立了基于飞行器运动固定型数学模型下的极大似然函数，并给出了一种实用极大似然算法及其实现。

A Practical Maximum Likelihood Method in Estimation Kinematics Characteristic for Flight Vehicle

Firstly,this paper points that the different influence of nonlinear factor and random noise on the kinematics behavior for flight vehicle. There are many difficulties for the structural model identification of the aerodynamic coefficient, flight stability and control ability indexes. Thus, to solve this problem, author used the maximum likelihood estimation method to get high order of identification efficiency, and then is built the maximum likelihood function based on determinate mathematical model for flight vehicle motion .A practical algorithm and implementation of this algorithm are given. Finally, this paper also deeply studies statistics characteristic for this algorithm. The statistic simulation results show that the maximum likelihood method have high accuracy in identification kinematics characteristic for flight vehicle. It is expedient estimation method.